A public facility which is mostly used by local associations for events and festivities. Sometimes it can also be used for private or commercial events. See wikipedia:Community centre. Use an operator=*-Tag in conjunction to indicate who operates the facility.

These facilities are not used for administration or government purposes, so do not mix them up with the "townhall".

Uses around the world

In Germany we call it Bürgerhaus oder Dorfgemeinschaftshaus (in smaller village) or Stadthalle (in bigger towns). Almost every village or town in Germany has such a Community Centre. So it is a very important POI.

In Canada, we call it a community centre in English, or centre communautaire in French, a public building in which community gatherings and/or sporting activities are held. (Natural Resources Canada - CanVec Map Features Definition Code 2010080 (node) & 2010082 (area))

In France, we call it Salle des fêtes. Almost all the village have one like this, and you can rent it for weddings or other festivities.

In Italy there is centro sociale which corresponds to this tag.

In Latin America is salón de fiestas y/o eventos. It's a place to rent for parties/events.

In India, places called kalyan mandap, wedding hall or function hall are run by public and private entities. These are available for rent for events.

In Japan, there are many Kominkan (公民館) for each community. They are owned and run by local governments. They have rooms for rent for local events or meetings of community. Sometimes they have also a small library and an exhibition room of local history. They often provides learning programs in arts, sports, handiwork and cultural activities.

Spelling

The proposal has been submitted to review (and approved) with the American spelling 'center'. But tags are until now using the UK (and Canada) version. To keep consistency, the proposal has been renamed 'community_centre'.
http://en.wikipedia.org/wiki/Community_centre